Nut-lock.



PATENTED NOV. 14, 1905.

0. W. BURNHAM.

NUT LOCK.

APPLIOATION FILED MAB..21, 1905' (j ZMwm/mm w vtweoom G W. (2%0Q FFIQE.

CORNELIUS W. BURNI-IAM, OF PATRICK, MISSISSIPPI.

NUT-LOCK.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Application filed March 21, 1905. Serial No. 251.201.

To all whom it may concern.-

Be it known that I, CORNELIUS W. BURNHAM, a citizen of the UnitedStates, residing at Patrick, in the county of Rankin, State ofMississippi, have invented certain new and useful Improvements inNut-Locks; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to nutlocks, and more particularly to the classof base-washer nut-locks, the object of the invention being to provide acheap and simple construction that will hold positively and in which thenut may be easily and quickly locked and unlocked at different points ofits rotation.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is an elevation showing a portion of a railway-rail with afish-plate having bolts and nuts equipped with the present invention.Fig. 2 is a longitudinal horizontal section through the structure shownin Fig. 1, one of the uuts being locked and the other unlocked. Fig. 3is a plan view of the double washer employed.

Referring now to the drawings, and more particularly to Figs. 1, 2, and3 thereof, there is shown a railroad-rail 10, against which are disposedthe usual fish-plates 11, the rail and plates being perforated toreceive the bolts 14. Over the threaded ends of the bolts and againstthe outer face of the corresponding fish-plate are disposed the endmembers 15 of a double washer, these end members being circular andconnected by an integral bar 16, so that rotation of the double washeris prevented. In each end member of the double washer is formed anannular series of perforations 17 equidistant from the centralperforation 18 of the end member and for a purpose to be presentlyexplained. Upon each of the bolts is engaged a nut 18 of usual form,with the exception that in the outer face thereof and across one corneris formed a groove 19, the ends of which open through corresponding sidefaces of the nut, and from the bottom of this groove there leads apassage 20 entirely through the nut, the lower end portion of thepassage being increased in diameter, as shown at 21. In the minorportion of the passage is slidably engagedv the stem 23 of a plungerhaving a head 24, that slidably fits the major portion of the passage,the plunger being held normally and yieldably projected from the lowerend of the passage by means of a helical spring 23, disposed upon thestem ofthe plunger and resting with its ends respectively against thehead of the plunger and the inner end of the major portion of thepassage. IVhen the plunger is projected, it engages one of theperforations 17 and holds the nut against rotation on the bolt. Theouter end portion of the plunger is provided with a transverse pin 25,which when in the groove 19 permits of projection of the plunger fromthe rear face of the nut. The plunger may be drawn outwardly to move thepin out of the groove and then rotated to cause the pin to lie againstthe outer face of the nut, when the pin will hold the plunger out ofengagement with the washer and the nut may be then rotated. The outerend portion of the plunger is provided with serrations 27 on oppositefaces to facilitate engagement of a pairof pliers therewith when theplunger is to be retracted.

What is claimed is- The combination with a body having apair of boltsengaged therethrough, of a washer comprising end members disposed overthe bolts and a connecting integral bar, said end members having each anannular series of perforations. a nut engaged with each bolt, aspring-pressed plunger carried by each nut and disposed to engage aperforation in the corresponding end member of the washer, the outerface of each nut havingaslot formed therein and opening through twomutually adjacent side faces of the nut, and a pin engaged transverselythrough each plunger and adapted to lie entirely within thecorresponding slot when the plunger is engaged in a perforation of thecorresponding end member of the washer and adapted at other times to lietransversely of the slot against the end face of the nut to hold thecorresponding plunger retracted.

' In testimony whereof Iaifix my signature in presence of two witnesses.CORNELIUS IV. BURNHAM. \Vitnesses:

J. (1. Bacon, I). A. Knssn.

